The present invention discloses an indoor invisible optical cable and its preparation method. The invisible optical cable comprises an optical fiber and a transparent tight-fitting layer, wherein the outer wall of the optical fiber is fixedly connected to the transparent tight-fitting layer. The transparent tight-fitting layer is prepared from a polyester-based composite material, which is a PETG/transparent nylon blend; The preparation method comprises the following steps: placing PETG into a twin-screw extruder, adding transparent nylon at 300–315°C to prepare melt blend A; Subsequently, cooling to 50–60°C, β-2-Si₃B₃N₇ is added to the molten blend A to form molten blend B; Molten blend B is injection molded onto the optical fiber surface to form an invisible optical cable; The present invention enhances the transparency of the transparent tight buffer layer while improving its mechanical properties. This increases the transparency of rigid optical cables, enhances their aesthetic appeal, facilitates installation, and extends their service life.
Country Code: CN
Application Number: CN202211124548.8
